Water tank meter, capacitive sensor
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Posts: 46,084
No the article I'm referring to is available at the Nuts and Volts
magazine website and the app note refers to just one method. That
being a capacitive sensor place on an external tube. As the water
enters the tube the dielectric coeffcient is changed and the frequency
of the oscillator shifts accordingly.
ftp://nutsvolts.com/stampaps/st_ap27.pdf
Try it. It works well, and best of all the electrics never get wet.
Ron
Original Message
From: <samhell@s...>
To: <basicstamps@egroups.com>
Cc: <ebowam@h...>
Sent: Friday, October 13, 2000 10:38 PM
Subject: Re: [noparse][[/noparse]basicstamps] Water tank meter
> The article Ron Anderson refers to has about 10-12 ways to measure
water
> levels in containers, some with mechanical means, others with
resistance,
> conductivity, and some other means. I dont have the link to the
article
> either, but I think I saved the pdf. somewhere..I will
look for
> it and sent it if I find it. I seem to recall
stumbling over
> it pretty easy though.
>
> Dave
>
Original Message
> From: Brian McClure <bmcclure@p...>
> To: basicstamps@egroups.com <basicstamps@egroups.com>
> Cc: ebowam@h... <ebowam@h...>
> Date: Friday, October 13, 2000 6:14 PM
> Subject: Re: [noparse][[/noparse]basicstamps] Water tank meter
>
>
> >If you are looking for a pressure sensor check Motorola
www.mot.com they
> >have true, differential and other types of pressure sensors. Most
have a
> >0-5v output which you could read using an ADC. You can call or
email them
> >and many times get engineering samples for free.
> >
> >
> >
> >Brian
> >
> >
> >
Original Message
> >From: "Mindz Development House" <mindz@a...>
> >To: <basicstamps@egroups.com>
> >Cc: <ebowam@h...>
> >Sent: Friday, October 13, 2000 10:33 AM
> >Subject: [noparse][[/noparse]basicstamps] Water tank meter
> >
> >
> >> I have two 500 gallon water tanks as the main water supply source
for a
> >> house. I'm trying to build a level meter using a Stamp. My
major hurdle
> >is
> >> how to determine the water level in the tank electronically
(without
> >> mechanical floats). Does anyone out there have any practical
ideas?
> >> Thanks
> >>
> >> Ebow
> >>
> >>
> >>
> >>
> >>
> >>
> >
> >
> >
> >
> >
>
>
>
>
>
>
magazine website and the app note refers to just one method. That
being a capacitive sensor place on an external tube. As the water
enters the tube the dielectric coeffcient is changed and the frequency
of the oscillator shifts accordingly.
ftp://nutsvolts.com/stampaps/st_ap27.pdf
Try it. It works well, and best of all the electrics never get wet.
Ron
Original Message
From: <samhell@s...>
To: <basicstamps@egroups.com>
Cc: <ebowam@h...>
Sent: Friday, October 13, 2000 10:38 PM
Subject: Re: [noparse][[/noparse]basicstamps] Water tank meter
> The article Ron Anderson refers to has about 10-12 ways to measure
water
> levels in containers, some with mechanical means, others with
resistance,
> conductivity, and some other means. I dont have the link to the
article
> either, but I think I saved the pdf. somewhere..I will
look for
> it and sent it if I find it. I seem to recall
stumbling over
> it pretty easy though.
>
> Dave
>
Original Message
> From: Brian McClure <bmcclure@p...>
> To: basicstamps@egroups.com <basicstamps@egroups.com>
> Cc: ebowam@h... <ebowam@h...>
> Date: Friday, October 13, 2000 6:14 PM
> Subject: Re: [noparse][[/noparse]basicstamps] Water tank meter
>
>
> >If you are looking for a pressure sensor check Motorola
www.mot.com they
> >have true, differential and other types of pressure sensors. Most
have a
> >0-5v output which you could read using an ADC. You can call or
email them
> >and many times get engineering samples for free.
> >
> >
> >
> >Brian
> >
> >
> >
Original Message
> >From: "Mindz Development House" <mindz@a...>
> >To: <basicstamps@egroups.com>
> >Cc: <ebowam@h...>
> >Sent: Friday, October 13, 2000 10:33 AM
> >Subject: [noparse][[/noparse]basicstamps] Water tank meter
> >
> >
> >> I have two 500 gallon water tanks as the main water supply source
for a
> >> house. I'm trying to build a level meter using a Stamp. My
major hurdle
> >is
> >> how to determine the water level in the tank electronically
(without
> >> mechanical floats). Does anyone out there have any practical
ideas?
> >> Thanks
> >>
> >> Ebow
> >>
> >>
> >>
> >>
> >>
> >>
> >
> >
> >
> >
> >
>
>
>
>
>
>